czas.

wither; shrivel; grow stunted; languish; pine (often with away; to lose strength, become weak (with pain, grief etc.) • Since his death she has been pining (away)); peak; waste; waste away (to decay; to lose weight, strength and health etc. • He is wasting away because he has a terrible disease); pine away; decay; emaciate (о человеке); languor; etiolate; sicken (о растении); die away; consume away; fall away; loose power (двигатель Damirules); become weak (of persons); tire oneself out; wilt (of plants); consume; stall (потеря оборотов, напр., двигателя Damirules); rot (из-за болезни); be in a decline; consumption to suffer; decaying; decline; die (о растениях); dwindle; perish; pule; sick; wizen; fade; fade (sashkomeiste)

pine (of a person; impf of зачахнуть); of a person become weak (impf of зачахнуть); of a person waste away (impf of зачахнуть)